A couple of feature that I was happy to see carried over from the AR-15 lower are the aggressive texture on the front of the mag well which can be used as a support hand grip and they also used the threaded brass insert for the pistol grip screw so you can really tighten the grip screw down without stripping the threads. They also reinforced key areas of the lower so you don’t have to worry about them breaking like other less desirable poly lowers do.